EntityTable::deleteByGroupId

static function deleteByGroupId(int $groupId)
{
	$connection = Application::getConnection();

	$queryObjectResult = $connection->query(
		'SELECT ID FROM '.self::getTableName().' WHERE GROUP_ID = '.(int) $groupId
	);
	while ($entity = $queryObjectResult->fetch())
	{
		ItemTable::deleteByEntityId($entity['ID']);
	}

	$connection->queryExecute('DELETE FROM '.self::getTableName().' WHERE GROUP_ID = '.(int) $groupId);
}